机构地区:[1]Key Laboratory of Ministry of Agriculture on Agro-Environment and Climate Change,Institute of Environment and Sustainable Development in Agriculture(IEDA),Chinese Academy of Agricultural Sciences [2]College of Agriculture,Shanxi Agricultural University [3]Centre for Systems Biology,University of Southern Queensland
出 处:《Journal of Integrative Agriculture》2015年第5期977-983,共7页农业科学学报(英文版)
基 金:supported by the National Key Technologies R&D Program during the 12th Five-Year Plan of China(2013BAD11B03-8);the National Basic Research Program ofChina(973 Program,2012 CB955904);the Natural Science Foundation of Shanxi Province,China(2013011039-3);the Agricultural Science and Technology Innovation Program of CAAS;the Earmarked Fund for Modern AgroIndustry Technology Research System,China(CARS-3-1-24);Shanxi Agricultural University Doctoral Scientific Research Fund,China
摘 要:Mung bean(Vigna radiata L.) has the potential to establish symbiosis with rhizobia,and symbiotic association of soil micro flora may facilitate the photosynthesis and plant growth response to elevated[CO2].Mung bean was grown at either ambient CO2 400 μmol mol^(-1) or[CO2]((550+17) μmol mol^(-1)) under free air carbon dioxide enrichment(FACE) experimental facility in North China.Elevated[CO2]increased net photosynthetic rate(Pn),water use efficiency(WUE) and the non-photochemical quenching(NPQ) of upper most fully-expanded leaves,but decreased stomatal conductance(Gs),intrinsic efficiency of PSII(Fv '/Fm'),quantum yield of PSII(φ(PSll)) and proportion of open PSII reaction centers(qp).At elevated[CO2],the decrease of Fv'/Fm',φ(PSII),qp at the bloom stage were smaller than that at the pod stage.On the other hand,Pn was increased at elevated[CO2]by 18.7 and 7.4%at full bloom(R2) and pod maturity stages(R4),respectively.From these findings,we concluded that as a legume despite greater nutrient supply to the carbon assimilation at elevated[CO2],photosynthetic capacity of mung bean was still suppressed under elevated[CO2]particularly at pod maturity stage but plant biomass and yield was increased by 11.6 and 14.2%,respectively.Further,these findings suggest that even under higher nutrient acquisition systems such as legumes,nutrient assimilation does not match carbon assimilation under elevated[CO2]and leads photosynthesis down-regulation to elevated[CO2].Mung bean(Vigna radiata L.) has the potential to establish symbiosis with rhizobia,and symbiotic association of soil micro flora may facilitate the photosynthesis and plant growth response to elevated[CO2].Mung bean was grown at either ambient CO2 400 μmol mol^(-1) or[CO2]((550+17) μmol mol^(-1)) under free air carbon dioxide enrichment(FACE) experimental facility in North China.Elevated[CO2]increased net photosynthetic rate(Pn),water use efficiency(WUE) and the non-photochemical quenching(NPQ) of upper most fully-expanded leaves,but decreased stomatal conductance(Gs),intrinsic efficiency of PSII(Fv '/Fm'),quantum yield of PSII(φ(PSll)) and proportion of open PSII reaction centers(qp).At elevated[CO2],the decrease of Fv'/Fm',φ(PSII),qp at the bloom stage were smaller than that at the pod stage.On the other hand,Pn was increased at elevated[CO2]by 18.7 and 7.4%at full bloom(R2) and pod maturity stages(R4),respectively.From these findings,we concluded that as a legume despite greater nutrient supply to the carbon assimilation at elevated[CO2],photosynthetic capacity of mung bean was still suppressed under elevated[CO2]particularly at pod maturity stage but plant biomass and yield was increased by 11.6 and 14.2%,respectively.Further,these findings suggest that even under higher nutrient acquisition systems such as legumes,nutrient assimilation does not match carbon assimilation under elevated[CO2]and leads photosynthesis down-regulation to elevated[CO2].
关 键 词:photosynthesis photosynthetic elevated stomatal PSII maturity nutrient assimilation ambient facility
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